Pneumatic tire.



UNITED sTATEs PATENT OFFICE;

lPNEUIVIATIC TiRE.

Jno. 850,956.

Specification of lLetters Patent.

Application filed October 11,1906. Serial No. 838,436.

To all whom it may concern:

'Be it known that I, GEORGE L. MCQUIGG,

' a citizen of the United States, residing in the VIo city of Flint, State of Michigan, have invented certain new and useful Improvements in Pneumatic Tires, o f which the following is a specification. l

y invention relates to pneumatic tires, and more particularly to shoes or casings )forming a part-of the type of pneumatic tires 'known as double-tube, which are now quite generally employed on automobiles or .motor-cars.

The object of the invention is to provide a tire which isparticularly simple in construction and highly elicient in use. i

The invention includes the combination .and arrangement of parts to be hereinafter described, and pointed out in the claims.

A preferred exempliiication of the invention yis shown inthe accompanying drawings, in which.m

Figure l is a transverse sectional view of construction or armor embodied in thetread portion v of the casing itself, and it further includes a non-heat-conducting medium conf s tituting a part of the casingfor preventing' the transmission of heat egenerated lat the Vstrip b, the corresponding A the twovstrips being brought together and tread of thetire from being ytransmitted to the air-tire housed inthe casing. f*

In the particular eXem vlification of my invention Iillustrated in t el accompanying drawings the outerlayer or strip of the casing is designatedy a and the inner layer or side portions of doubled over to form the clencher-beads c.

An additional strip of rawhide is preferably located between the two layersa fb at the tread position for the 'purpose of reinforcing the same,

this strip or Vinsert being designated d..

As before premised, the clencher-beads c are formed integral with the body of the casing by bending over .and suitably securing together the longitudinal marginal portions of thel inner and outer layers a b. As illustrated herein, the said marginal portions of the layers 4are bent outwardly and the marginaliarts of the 'inner `layer b extended aroun the edge of the layer a and inserted or tucked between the latter and the periphery of thecasing formed by the main part of the layer a. Suitable fastening-rivets (designated e) are employed for'retaining the beads in shape,` these rivets preferably eX- tending through the doubled-over portions of the layers a b, which form the beads, and through the main portions of the layers c contiguous to the beads, so. that these beads are securely held down in position, and the two layers ab are'seourely fastened together. In the construction of the tire illustrated the heads of the beads are located on the inner periphery of the casing and are pressed down flush therewith, and theends ofthe Shanks of the rivet are headed overon the outer surface. lof the beads uponsuitable washers, which rest upon these outer surfaces.

The non-heat-'conducting,medium for protecting the inner tube is preferably located between the insert d and the inner layer b. In thepresent embodiment of the invention this medium (designated f) is shown as a strip of asbestos, which is cemented to the outer surface of the inner layer b.

As hereinbefore indicated, my improved casing embodies a novel construction of armor-treadA constituting a substantially integral part of the casing itself. This tread is rovided by a series of rivets g, having large heads providing lthe tread-surfaces.' These rivets, with associated washers, are of novel construction, as they provide for `a slight movement of theindividual rivets upon .contact with anobstruction with a minimum liability of loosening Vthe rivet in the casing.

As herein illustrated, each rivet is provided with a large 'head projecting from the peripheryof the casing, which rests upon a washer h, located beneath the head and between the latter and the periphery of the layer a, this Washer fitting t eshank i of the rivet-loosely.

The shank of the rivet `rextends through` the layer a and through the insert d and 1s headed up upon a washer which fits theshank tightly and rests upon the inner face of the Patented Apin' 23, 190'?,4 I

ITO

Vinsert. The rivets g tightly compress the layer a and insert d together and are held in position in' a substantially rigid manner; but

the loose i'it of the washer 71, to the shank of the rivet permits of the lat'terhaving some slight lateral movement when the head strikes an obstruction without loosening the rivet inthe easing.

.The construction and operation of my invention will be understood from the foregoing description, taken in connection with the accompanying drawings, and it will be appreciated. that other embodiments of the invention may be made in addition to the particular exeinpliiication illustrated and described without departing from the spirit and scope thereof.

I claim- 1. As a new article of manufacture, a tirecasing including yan inner. and an outer layer, said layers being doubled over at their side margins to provide clencher-beads and rivets for securing said beads, substantially as described.

2. As a new article of manufacture, a tirecasing including an inner 'and an outer layer, the marginal portions of both layers extending outwardly and the marginal portion of saidl inner layer extending around the edges of the marginal portion ofthe outer layer and being tucked in between the rlatter marginal portion and peripher of the casing and rivets extending through the several thicknesses for securing the parts, substantially as described.

3. As a new article of manufacture, a tirecas'ing including two, strips or layers of stretched rawhide, an insert of rawhide between said layers and an armor for the tread of the casing comprising a plurality of rivets having heads projecting from the periphery of the casing and two washers associated with each rivet, one of said washers resting upon the insert and iitting the shank of the rivet tightly, the end of the shank being headed up thereupon and the other Washer lfitting the shank ofthe rivetloosely and being interposed between the head of the rivet and the periphery of the outer layer, substantially as described.

In testimony whereof I have hereunto signed my name, in the presence of two attesting witnesses, at Flint, Michigan, this 8th day of October, 1906. l

GEORGE L. MCQUIGG. Witnesses:

FRANK DULLAM, A. P. DULLAM. 

